Ok everyone this is a new one on me.
Cruzin about 75 when I came to a town and had to slow for a 45 limit. By the time I slowed to 45 the motor died still in gear. Car was running good til it died. Pulled into a station and tried to start. Motor spins freely as in no compression. Tow the car home. Cap and rotor are damaged so I get new parts. This may not be related and it certainly made no diff as it still spins like no compression.

With the cap off I turn the motor and the dist is not turning.

Pull the valve cover. Everything looks fine. Belt is tight.

Turn the motor, cams and belt does not turn.

Pulled the upper portion of the belt cover. The belt appears to be in good condition and is not loose.

This is as far as I have gotten. The crank pully including the p/s, a/c, and alt belts still turn with the motor.

Motor is a 96 B20b in a 91 teg. Everything is stock to the car except the motor itself. If you could not ID a B20b then you would think the car was stock.

Before I get in there anyone have a clue what I am going to find or what I should be looking for?

Any help is much appriciated.

 

Hmm I wonder if the bolt(s) on the cam gear(s) is loose. This would technically cause the cam gears to turn without turning the camshaft. Look for something around there.

 

Sorry but the belt itself does not turn so there is no motion getting to the cam gears. Besides the bolts would have to be missing for the gear to turn without turning the shafts.

Thanks for the reply though

 

Oh for some reason, I thought the belt turned. h: Sorry.

 

Maybe it's the crank pulley bolt then. This would make sense I think this time, since the timing belt would still be tensioned but the crankshaft timing belt pulley isn't turning. The actual crankshaft doesn't turn does it?

 

Or the teeth on the belt at the crank all stripped off. Would be weird but possible.

 

The starter turns the crank so yes the crank is turning. The pulley on the front of the motor uses a key to keep it properly aligned with the crank, and then uses a bolt to hold it in place. The pully actually does turn with the crank as that is what is turning the alt, p/s, and a/c belts.
I have not been inside the timing cover yet so I am not familiar with how the pully that turns the timing belt is attatched to the crank but I assume it uses a key as well.
The only possibilities I can think of for this problem would be the key broke, the pulley broke, or the belt stripped its teeth at the pulley so that the pulley is spinning freely in the belt instead of turning it.
This is all new to me in that I have never heard of any of these happening before. Was looking for insite from others that may have had some experience in this area.

Thanks for the suggestions.

 

Turn the top end by putting a wrench on one of the cam pulleys.

 

the cams and crank are keyed and will rotate correctly without their retaining bolts installed (not at high rpm)

the belt is obviously broken or the crank timing driven gear is stripped off. rotating the engine is probably mashing any valves that are stuck open from the first stall. fact remains the belt is broken, u probably have internal head damage and either way the motor needs to come out or at least pop the lower timing cover and face the inevitable... and then remove your head and get the valves and guides changed

~boom

 

I agree about the likely bad belt.
B20's are low compression motors and I am not sure it is an interference motor. If not then my valves are likely fine. My free spinning motor is making no noises that I think I would hear if I was contacting valves. However I will admit that it is possible I have bent valves.
I was simply looking for experience with this problem as I am used to hearing about broken belts and mine does not act like it is actually broken but only stripped. I have gotten in to where I can grab the belt and try to pull it out. If it was broken it should come out or at least be loose so I am assuming it is still full circle.

Thanks for the confirmation on the keyed pulleys.